Air-separator.



No. 877,557. PATENTED JAN. 28, 1908.

G. S. EMERIGK. AIR SEPARATOR.

APPLICATION FILED JUNE 11, 1907.

no! s77,557.

3 UNITED STATES PATENT orFIoE.

GEORGE S. EMERIGK, OF NAZARETH, PENNSYLVANIA.

AIR-SEPARATOR.

the finer particles of previously ground or comnimuted material are separated from the massand,particularly, to that class of sepa- .rators wherein the separation is obtained by subjectingthe mass of material centrifugally discharged within an inner casing to the weighing or winnowing action of an ascend- ,ing air current which carries the finer articles nto a separate outer casing where t icy may be collected.

In separators of this class it is preferable to secure a continuous circu ation of the 8.11.

current within the apparatusrather than to draw the air supply from outside, as the latter method ives rise to back pressure and 3 is otherwise objectionable. But the difiiculty'hitherto experienced in using 'a continuous return circulation of air within the casings has been that the opening from the outer into the inner casing is located in such proximity to the fan which creates the air current that the descending current in the outer casing loadedwith' the fine separated particles of material is prematurely drawn again into the inner casing. This causes a re-w-innowing of the already so arated materialwith consequent waste 0 power and loss in the out ut of the separator, due to the same materia being, so-to speak repeatedly re separated.

gkMyobject is to obviate the above-mentioned defect in this class of separators by so arranging and adjusting the cas' s as to increase or decrease at will the pat traversed by the return current of air within the casings. This I. accomplish by the means herein described and shown in the accompanying drawing in which- Figure l is aview, in vertical section, of the entire separator. Th; consists of the outer casing 1 mounted upon suitable supports 2 and provided with the discharge outet 3. The inner casing 4, supported upon the brackets 5 secured to the outer casing 1, is cylindrical'in form and is provided with the auxiliary truncated cone-shaped deflector 6. The adjustable sleeve 7, fitting closely around the lower portion of the inner Specification of Letters Patent. Application filed'J'une 11. 1907- SeriaI No. 378.344-

. The feed V rammed Jan. 28,1908.

casing 4, is suspended from the horizontal shaftS by the c ains 9 and drums 10. The

shaft 8 is mounted in the outer casing 1 by the-bearings 11 and is rotated by the hand wheel 12.

' The funnel 13, terminating in the outlet 14, is suspended within the lower portion of the inner casing 4 by meansidentical in character with those above described for suspending the adjustable sleeve 7, the

means for suspending the cone-shapedcasing 13 being indicated by the chain 15 drum 16, shaft 17, and hand-wheel 18. The

brackets 19, extending inwardly from;.the lower edge of the casing 4, serve'as guides to assist in maintaining the funne 13 in position when atits lowest point of adjustment. The cylindrical outlet 14 of the funnel 13 fits into the sleeve of the discharge pipe or out- .let 20, which serves to maintain communicatlon between the outlet 14 of the casing and the discharge .pi e 20 while at the same time allowing vertica adjustment of the funnel l3.

The hollow rotary shaft 21 extends vertically downward through the top of the outer casing 1 into the upper portion of the inner casing 4 and is actuated by any suitable means, such as the horizontal shaft 22, pulley 23 and gears 24 and 25. The shaft 21 carries-thefans 26, adapted to rotate in the space between the to of the inner and outer casings. The disc large plate 27 is secured to the lower end of the shaft 21. ipe 28 is mounted within the rotary 1101 ow shaft 21 by the bearing 29 at the top of the latter and extends downward to a point a little above the discharge plate 27. the hopper 30 and the shield 31, the function of the latter being to protect the gears 24 and 25 from any overflow from the happen.

The mode of operation of my improved air-separator is as follows: The material to be separated, having been previously crushed or reduced to a relatively fine state, is fed into the hopper 30 and passing thence down the feed pi e 28 to the discharge plate 27 is distributed liorizontally by the rotation of the latter, in a thin film or shower. The rotation of the fan 26, the blades whereof may be given a slight pitch, causes an updraft of air within the innerv casing 4 wh ch picks up the finer particles of material so distributed by the action of the discharge plate and carries them over the top of the The feed pipe 28 is provided with the distance between the discharge inner easing into the annular space between the inner 1 and outer casings where they settle to the bottoin of the outer casing and able conical casing 13 to the/discharge. pipe 20, from whence,v they may he "collected, reground-and reintroduced into'the hop er 30. The ,path of the air current isindi adjustable sleeve 7 is then shown raised about to its highest point. if thisis nowlowered by the rotation of the hand-wheel 12 and Shaft-'8 unwindins thechains' Qupon their drums the length of the inner casingis,

inkeflect, increased, correspondingly increasplate and the point at which the air from the v 0utercas1ng"re'nters the inner casing and 1 be ins its 11 Ward, movement." Not on Y can the lengt of the path traversed by the v circulatory air current be thus increased,

but also, the volume of air'drawn into the .mner casing from below may be regulated by the same means. ll'o'r as the sleeve? is lowered ltSlOWI' hp or edge approaches the "inwardly sloping'lower portion of the outer casin ggu diminishing the annular opening through'which the air isdrawn. p

Another, meansfor nodii'ying both the path and the'lvolume of the ascending air current is sup lied in the suspended, ad-

justable ".13. This is shown in. the drawing adjusted yetits lowest point. 'By

man ipulation of its hand wheel, shaft, drums and chains itmay be raised until its upper .ed apprmimates more or less to the in wardly sl 1g deiieetoi; Either of'these means :for eentroiiing the path and volume cated by the dotted arrows in the drawing. The

of the air current Inay-beseparately employed, or they may, if desired be used in conjunction, by lowering the sleeve 7 and raisingthetunnel 13 to any requisite extent,

suitable Well-known form of ratchet and pawl mechanism ,(not shown) may be em loyed in connection with the shafts 8 am l'itoinaintain the sleeve 7 and funnel 13 Y at the desired point What I claim asiny invention and desire to ame by Letters- Patent is 1,1 lncombination, an outer casing with 'tapered outlet, an inner cylindrical casing'i arranged Within said outer casing and pro- -vided with the truncated cone shaped deflector 6, an} adjustable sleeve fitting. saidinner cylindrical casing: means foe-raising and lowerin {said sleeve, a funnel adjust" ably suspen ed beneath the deflector 6, and

meansfor-r'aising and lowering said funnel,

substantially asdescribed. 2. In combination, an outer casing'with tapering base, an inner cylindricalfcasing jofl less diameter thanlsald "outer, casing-and.

mounted: therein, a ltruncated vcone shaped deflector seeiu'edwithin said inner 'cylindrical casing. an adjustable sleeve inelosingi' the lower portion of'said inner cylindrica casing, means for raising and lowering said sleeve, afunnel ad uStably suspended neath said-deflector, means for raising and lowering said funnel, a rotary hollow shaft, a fan and a discharge plate secured thereto and actuated thereby,'a feed pipe, and'means for actuating saidrotary hollow shaft, suhstantially as described. a i

' In testimony whereof Irhereunto afiix my 89.

signature in presence of two witnesses.

GEORGE s. EMERIOK.

"Witnesses: i

CLINTON Av Sownns,

H. B. SonnRMERrroRN. 

